Street-sweeping machine



(No Model.) 2 Sheets-Sheet 1.

A. STACKPOLB, Jr.

STREET SWBEPING MACHINE.

No. 287.186. Patented oct. 23, 1883.

N. FETERs Phnm-Lmwgnpher, wnshngmn. Dlc.

(No M0881.) 2 sheet-sheet 2.

A. STACKPOLB, Jr.

' STREET SWEEPINGMAGHINB.

N0. 287,188. Patented 008. 28, 1888.

UNITED STATES v*PATENT OFFICE.

AARON STAOKPOLE, JR., OF BOSTON, MASSACHUSETTS.

sTRET-'SWEEPING MACHINE.

SPECIFICATION forming part of Letters Patent N0. 287,186, dated October 23, 1883.

Appuation inea August 5,1882. (No model.)

To all whom it may concern.-

Be it known that I, AARON STACKPOLE, J r., of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Street-Sweeping Machines, of which the following is a specification.

My invention relates to a means for raising and lowering the rotating brush, and also for adjusting the same so as to ,touch the ground evenly.

Referring to the accompanying drawings, Figure l represents a side view of a streetsweeping machine embodying my improvements. Fig. 2 is a plan ortop view ofthe same. Figs. 3 to 8- are enlarged detail views of the several portions of my improvements.

A is the main fra-me, which is supported upon an auxiliary light iron frame, B, supported upon the axle or shaft O. Upon the axle O is fixed a bevel-wheel, D, which gears with a smaller bevel-wheel, E, on a counter-shaft, F, which latter carries on its opposite end a sprocket-wheel, G. Overthis sprocket-wheel G passes au endless chain, H, which also passes over a sprocket-wheel attached to the end of the brush-roller I. The brush-roller I is carried by arms J J, which are loosely connected one to the axle C and the other to the countershaft F.

K is a rock-shaft, (shown in Figs. 2 and 3,) upon which is fixed a bevel-wheel, L, that gears with the bevel-wheel M on the countel'-, shaft N, xwhich latter is supported in bearings from the frame A. On the counter-shaft N is fixed a ratchet-wheel, I), and also a handlever, Q.

f It is a pawl p/ivoted in bearings S, attached to the under side of frame A. (See Figs. 3 and 4.) The extension r of pawl R is secured to the lower end of a forked stem, T, which has a button on its upper end, and is held in its normal position by means of a spring, U, attached to the under side of frame A. The rock-shaft K is supported in bearings 7c 7c, attached to the frame B. When the brush I is in contact with the ground and it is required to be raised, the driver presses down the stem I with his foot, which releases the pawl R from the ratchet-wheel I), leaving the shaft N free to turn. The driver then draws back the lever Q, causing the bevel-gear M to turn the bevel-gear L, and with it the shaft K, on the ends of which latter are thearms V, holding chains X, which support the rotating brush I.

To the ends of the arms V are swiveled nuts o, through which pass the screw-threaded rods W, having hooks ,on their lower ends. Upon these hooks are hung the chains X, the lower ends of the chains being connected to the arms J, so that should the brush not be exactly level or in proper relation to the surface of the ground the rod IV can be adjusted higher or lower on either side, so as to 'bring the brush into proper position.

The shaft or axle C of the driving-wheels O is supported in bearings a, secured to the frame B, (see Fig. 6,) and on the axle G is secured a box, b, into which passes anl elongation of the hub o, so that any dirt or dust that may be thrown up by the brush is prevented from working between the inside of the hub and the axle. The box b, called the sandbox, is provided on its outer periphery with ratchet-teeth, (shown in dotted lines in Fig. 8, which is an inside view of the hub, Fig. 7 being an outside view,) with which teeth the pawl d engages, so that when the wheels rotate in a forward direction the pawl d will cause the axle O to revolve; but when the machine moves backward the pawl d will ride over the ratchet-.teeth and prevent the axle from rotating. The pawl d is held in position by a spring, e, on the opposite side of the wheel, and which bears upon a square-headed nut, f, on the spindle g,whieh carries the pawl d. Vhen the brush is not to be rotated, the pawls d are thrown out of gear with the ratchets on the sand-boxes.

I am aware that it is not new to apply a pawl to the wheel for the same purpose as shown in my machine, and also that it is common to elongate the hub and place on it a box, and to these I make no claim 5 but What I claim as my invention isl. The combination of the auxiliary frame B, roclgshaft K, shaft N, and the intermediate gears, L lM, arms V, the lever Q, and the pawl and ratchet R P, all arranged and oper- In testimony whereof Ihave signed my nalne 1o ating substantially as and for the purpose set to this specification inthe presence of two suby forth. v scribing witnesses. 2. In a street-sweeping,` machine, in combi- A 5 nation, the axle C, the bearing a, elongated AARON STAGKPOLF, JR. hub c,box b,attaehed to the axle by setserews, Y and provided with ratchet-teeth, pawl d, and Witnesses: spring e, and the spindle g, all arranged as n Jos. H. ADAMS, shown, and for the purpose described. E. PLANTA. 

